Refactor network module

[MohShMehr]

What I have done and why

• Refactored the network module to use dependency injection (DI).
• Introduced separate interfaces for each entity API.
• No functional changes; behavior remains the same.

This refactor was inspired by using the NIA project as a base project. It improves maintainability and makes the codebase easier to extend when working with multiple API methods.

Testing

• Ran ./gradlew testDemoDebug locally; all tests passed.
• Applied formatting via ./gradlew --init-script gradle/init.gradle.kts spotlessApply.

Related issues

• N/A